KR101776266B1 - Multi directional antenna and mobile device having the same - Google Patents

Abstract

A multi directional antenna and a mobile device having the same are disclosed. The multi-directional antenna according to an exemplary embodiment includes a core structure where a magnetic core, a first antenna coil wound around the magnetic core in a first axis direction, a second antenna coil wound around the magnetic core in a second axis direction perpendicular to the first axis direction, and a third antenna coil wound around the magnetic core in a third axis direction perpendicular to the first and the second axis direction, and a substrate which has a receiving hole into which the lower end of the core structure is inserted in the center part thereof and is electrically connected with the core structure mounted thereon. It is possible to easily change the electrical property of the antenna.

Description

TECHNICAL FIELD [0001] The present invention relates to a multi-directional antenna and a mobile device having the multi-

Embodiments of the invention relate to antenna technology.

Generally, a smart entry system of a vehicle is provided with an antenna capable of receiving radio waves in three axial directions. Here, the antenna is formed by winding three antenna coils around the magnetic core in three axial directions. In the past, a method in which a plastic resin injection-molded terminal is formed at each corner of a magnetic core and the main board is connected to the magnetic core through the terminal. In this case, there is a problem that position of the terminal is limited and improvement of the performance of the antenna is not easy.

Korean Patent Publication No. 10-2015-0130247 (Nov. 23, 2015)

Embodiments of the present invention provide a multi-directional antenna that can easily change the electrical performance of an antenna and a mobile device having the same.

A multi-directional antenna according to an exemplary embodiment includes a magnetic core, a first antenna coil wound around the first core axis in the magnetic core, and a second antenna coil wound around the magnetic core in a second axis direction perpendicular to the first axis direction And a third antenna coil wound and formed along a third axis direction perpendicular to the first axis direction and the second axis direction in the magnetic core; And a substrate having a center hole formed with a receiving hole into which the lower end of the core structure is inserted, and the core structure being mounted and electrically connected to the core structure.

Wherein the magnetic core includes a seating groove formed so that a bottom edge of the magnetic core is removed by a predetermined thickness and has a stepped portion with respect to the bottom surface of the magnetic core, The receiving hole may include a seating portion in which each corner portion of the receiving hole extends inward.

The lower surface of the core structure and the lower surface of the substrate may have the same height.

The multi-directional antenna includes: a conductive pattern formed on an upper surface of the substrate and electrically connected to the core structure; And a connection pad formed on a lower surface of the substrate and electrically connected to the main board, and electrically connected to the conductive pattern through a via hole passing through the substrate.

At least one dummy conductive pattern formed on an upper surface of the substrate so as to be spaced apart from the conductive pattern; And at least one dummy connection pad spaced apart from the connection pad at a lower surface of the substrate and electrically connected to the dummy conductive pattern through a via hole passing through the substrate.

The conductive pattern may include a first conductive pattern formed along an edge of the upper surface of the substrate and electrically connected to one end of the first antenna coil; A second conductive pattern formed along the other edge of the upper surface of the substrate and electrically connected to the other end of the first antenna coil; A third conductive pattern formed along the upper edge of the upper surface of the substrate and electrically connected to one end of the second antenna coil; A fourth conductive pattern formed along the lower edge of the upper surface of the substrate and electrically connected to the other end of the second antenna coil; A fifth conductive pattern formed inside the first conductive pattern and spaced apart from the first conductive pattern and electrically connected to one end of the third antenna coil; And a sixth conductive pattern spaced apart from the second conductive pattern inside the second conductive pattern and electrically connected to the other end of the third antenna coil.

The connection pad includes a first connection pad formed on one side of a lower surface of the substrate and electrically connected to the first conductive pattern through a via hole; A second connection pad formed on the other side of the lower surface of the substrate and electrically connected to the second conductive pattern through a via hole; A third connection pad formed on the lower surface of the substrate and electrically connected to the third conductive pattern through a via hole; A fourth connection pad formed below the lower surface of the substrate and electrically connected to the fourth conductive pattern through a via hole; A fifth connection pad formed on one side of the bottom surface of the substrate and spaced apart from the first connection pad and electrically connected to the fifth conductive pattern through a via hole; And a sixth connection pad formed on the other surface of the substrate and spaced apart from the second connection pad and electrically connected to the sixth conductive pattern through a via hole.

The multi-directional antenna may include: a first soldering terminal formed at an end of the first conductive pattern, the first soldering terminal provided at one edge of the substrate; A second soldering terminal formed at an end of the second conductive pattern and provided at the other edge of the substrate; A third soldering terminal formed at an end of the third conductive pattern and provided at an upper edge of the substrate; A fourth soldering terminal formed at an end of the fourth conductive pattern and provided at a lower edge of the substrate; A fifth soldering terminal formed at an end of the fifth conductive pattern and spaced apart from the first soldering terminal at one side edge of the substrate; And a sixth soldering terminal formed at an end of the sixth conductive pattern and spaced apart from the second soldering terminal at the other edge of the substrate.

The multi-directional antenna may further include a mounting hole formed in at least one of the corners of the board and for mounting the board to the main board of the mobile device on which the multi-directional antenna is mounted.

A multi-directional antenna according to another exemplary embodiment includes a magnetic core, a first antenna coil wound around the first core axis in the magnetic core, a second antenna coil perpendicular to the first axis direction in the magnetic core, And a third antenna coil wound and formed along a third axis direction perpendicular to the first axis direction and the second axis direction in the magnetic core; A first substrate provided below the core structure, the first substrate on which the core structure is mounted and electrically connected to the core structure; And a second substrate provided below the first substrate and electrically connected to the first substrate and electrically connected to the main board.

The first substrate and the second substrate may each have a size corresponding to the core structure.

The multi-directional antenna may further include a reception hole formed at a central portion of the first substrate and into which the lower end of the core structure is inserted.

Wherein the magnetic core includes a seating groove formed so that a bottom edge of the magnetic core is removed by a predetermined thickness to have a stepped portion with respect to a bottom surface of the magnetic core, And a seating portion in which each corner portion of the storage hole extends inward so as to be seated on an upper surface of the receiving hole.

The lower surface of the core structure and the lower surface of the first substrate may have the same height.

Wherein the multi-directional antenna comprises: a plurality of soldering terminals provided on a lower surface of the first substrate, the plurality of soldering terminals being electrically connected to the core structure; And a plurality of window holes formed through the second substrate and formed at positions corresponding to the plurality of soldering terminals.

The multi-directional antenna includes: a plurality of first terminals electrically connected to the second substrate, the plurality of first terminals being electrically connected to the plurality of soldering terminals, the plurality of first terminals being electrically connected to the plurality of soldering terminals, And may further include a connection pad.

The multi-directional antenna includes a plurality of second connection pads formed on an upper surface of the second substrate and electrically connected to the plurality of first connection pads, respectively; And a plurality of third connection pads formed on a bottom surface of the second substrate and electrically connected to the plurality of second connection pads through via holes formed in the second substrate.

According to another exemplary embodiment of the present invention, there is provided a multi-directional antenna comprising: a magnetic core; a first antenna coil wound around the first core axis in the magnetic core; a second antenna coil wound around the first core axis in the second axis direction And a third antenna coil wound on the magnetic core along a third axial direction perpendicular to the first axial direction and the second axial direction, and a third antenna coil wound around the first antenna coil and the second antenna coil. And a plurality of connection members coupled to the lower corners of the magnetic core at a lower portion of the core structure, electrically connected to the core structure, and electrically connected to the main board.

The multi-directional antenna may further include an engaging protrusion protruding from a bottom edge of the magnetic core, and the connecting member may be engaged with the magnetic core by the engaging projection.

The connecting member includes: a body; A coupling groove formed on one surface of the body and having a shape corresponding to the coupling projection and into which the coupling projection is inserted; At least one soldering terminal protruding from the body and electrically connected to the core structure; And at least one connection pad formed on the other surface of the body, electrically connected to the soldering terminal, and electrically connected to the main board.

In the embodiment of the present invention, the core structure is received in the receiving hole of the board, and the core structure is electrically connected to the main board of the mobile device through the substrate while minimizing the thickness of the multi-directional antenna. Therefore, it is possible to improve the degree of freedom in designing without limiting the position of the contact terminal of the core structure to a specific position, and to easily change the electrical performance of the multi-directional antenna without changing the structure of the core structure .

The first substrate, the second substrate, and the main board are electrically connected to each other through the first connection pad, the second connection pad, and the third connection pad. And the second substrate may be formed to have a size corresponding to that of the core structure, thereby miniaturizing the size of the multi-directional antenna.

Further, by inserting the lower end of the magnetic core in the inside of the storage hole formed in the first substrate, the thickness of the multi-directional antenna can be reduced. That is, although the multi-directional antenna includes two stacked substrates, the height of the bottom surface of the magnetic core is made to correspond to the height of the bottom surface of the first substrate through the storage holes, thereby reducing the thickness of the substrate.

1 is an exploded perspective view showing a multi-directional antenna according to an exemplary embodiment;
2 is a perspective view of a multi-directional antenna according to an exemplary embodiment;
3 is a cross-sectional view showing a portion AA '
FIG. 4 is a plan view showing a top surface and a bottom surface of a substrate in a multi-directional antenna according to an exemplary embodiment;
5 is an exploded perspective view showing a multi-directional antenna according to the second exemplary embodiment.
6 is a plan view showing a state in which the core structure is placed on the first substrate in the multi-directional antenna according to the second exemplary embodiment;
7 is a bottom view showing a state in which the core structure is placed on the first substrate in the multi-directional antenna according to the second exemplary embodiment;
8 is a top view of a second substrate in a multi-directional antenna according to the second exemplary embodiment
9 is a bottom view of a second substrate in a multi-directional antenna according to the second exemplary embodiment
10 is a bottom perspective view of a multi-directional antenna according to the second exemplary embodiment.
11 is an exploded perspective view showing a multi-directional antenna according to the third exemplary embodiment.
12 is a bottom perspective view of a multi-directional antenna according to the third exemplary embodiment.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular form of a term includes plural forms of meaning. In this description, the expressions "comprising" or "comprising" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.

On the other hand, directional terms such as the top, bottom, one side, the other, and the like are used in connection with the orientation of the disclosed figures. Since the elements of the embodiments of the present invention can be positioned in various orientations, directional terms are used for illustrative purposes and not limitation.

Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Fig. 1 is an exploded perspective view showing a multi-directional antenna according to the first exemplary embodiment, Fig. 2 is a perspective view of a multi-directional antenna according to the first exemplary embodiment, and Fig. 3 is a cross- Sectional view showing a state in which the magnetic core is housed in the storage hole of the magnetic recording medium. In FIG. 3, the first antenna coil to the third antenna coil are omitted for convenience. The multi-directional antenna may be applied to, for example, a keyless entry system or a keyless start system of a vehicle, but is not limited thereto and may be applied to various fields requiring multi-directional communication .

1 to 3, the multi-directional antenna 100 may include a core structure 102 and a substrate 104. The core structure 102 may include a magnetic core 111, a first antenna coil 113, a second antenna coil 115, and a third antenna coil 117.

The magnetic core 111 may be made of a magnetic material such as ferrite. The magnetic core 111 may have a cubic or rectangular parallelepiped shape. The seating groove 121 may be formed at each corner of the lower surface of the magnetic core 111. The seating groove 121 may be formed such that the bottom edge of the magnetic core 111 is removed by a predetermined thickness and has a step difference of a predetermined height from the bottom surface of the magnetic core 111. In the exemplary embodiment, the seating groove 121 may be provided so as to have a stepped height corresponding to the lower surface of the magnetic core 111 and the thickness of the substrate 104. A portion of the seating groove 121 formed at each corner of the magnetic core 111 can be seated on the upper surface of the substrate 104. For this purpose, a receiving hole 123 may be formed in the central portion of the substrate 104. A detailed description thereof will be described later.

The first antenna coil 113 may be formed by winding the magnetic core 111 along the first axis direction (e.g., the X axis direction). The width of the first antenna coil 113 in the second axial direction (e.g., the Y-axis direction) may be smaller than the width of the magnetic core 111 in the second axial direction. One end and the other end of the first antenna coil 113 may be electrically connected to the substrate 104.

The second antenna coil 115 may be formed by winding the magnetic core 111 along the second axial direction (e.g., the Y-axis direction). The width of the second antenna coil 115 in the first axial direction may be smaller than the width of the magnetic core 111 in the first axial direction. The second antenna coil 115 may be formed perpendicular to the first antenna coil 113 in the magnetic core 111. One end and the other end of the second antenna coil 115 may be electrically connected to the substrate 104.

The third antenna coil 117 may be formed by winding the magnetic core 111 along the third axis direction (e.g., the Z-axis direction). The third antenna coil 117 may be formed to surround the side surface of the magnetic core 111. The third antenna coil 117 may be formed to have a height corresponding to the height of the magnetic core 111. One end and the other end of the third antenna coil 117 may be electrically connected to the substrate 104.

That is, the first antenna coil 113, the second antenna coil 115, and the third antenna coil 117 may be formed perpendicular to each other in the magnetic core 111. At this time, each corner of the magnetic core 111 may be exposed. At least one of the first antenna coil 113, the second antenna coil 115, and the third antenna coil 117 is wound around a separate jig to stably fix the antenna coil and secure a distance between the antenna coils The magnetic core 111 may be mounted on the magnetic core 111. [ However, the present invention is not limited thereto. At least two of the first antenna coil 113, the second antenna coil 115, and the third antenna coil 117 may be directly wound on the magnetic core 111, Protrusions or grooves may be formed in the antenna 111 for stable fixing of the antenna coil and separation from other antenna coils.

Although three antenna coils are illustrated as being formed in three axes, the present invention is not limited thereto, and five antenna coils may be formed in five axes. For example, a fourth antenna coil is formed at an angle of 45 degrees with the first antenna coil 113 in the first axial direction, and a fourth antenna coil is formed at a 45 degree angle with the second antenna coil 115 in the second axial direction. May be additionally formed. The fourth antenna coil and the fifth antenna coil may be formed so as to cross each other vertically.

The substrate 104 may serve to electrically connect the core structure 102 to a main board (not shown). Here, the main board may be a main board of a mobile device (e.g., a wearable device such as a smart watch, a smart phone, a tablet PC, a smart key, etc.) to which the multi-directional antenna 100 is mounted. The substrate 104 may be a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

A storage hole 123 may be formed at the center of the substrate 104. The accommodation hole 123 may be formed to have a size corresponding to that of the magnetic core 111. The storage hole 123 may be formed by removing the center portion of the substrate 104 in a size and shape corresponding to the lower surface of the magnetic core 111. At this time, the seating part 123a may be formed by connecting adjacent sides to the corner parts of the storage hole 123. The seating part 123a may be provided corresponding to the seating groove 121 formed on the lower surface of the magnetic core 111. [

The core structure 102 can be seated on the substrate 104 while the lower end of the magnetic core 111 is inserted into the receiving hole 123. At this time, the seating groove 121 of the magnetic core 111 is seated on the seating portion 123a formed at the inner corner of the receiving hole 123 of the substrate 104. [ In the exemplary embodiment, the seating groove 121 of the magnetic core 111 can be adhered to the seating portion 123a through the adhesive member. Here, the lower surface of the core structure 102 and the lower surface of the substrate 104 can be located on the same plane. That is, the lower surface of the core structure 102 and the lower surface of the substrate 104 may be provided at the same height. In this case, the height of the multi-directional antenna 100 can be reduced, and the core structure 102 can be fixed to the substrate 104 while downsizing the multi-directional antenna 100.

The core structure 102 is received in the receiving hole 123 of the substrate 104 and is seated to minimize the thickness of the multi-directional antenna 100 through the substrate 104 Can be electrically connected to a main board (not shown). Therefore, the degree of freedom in designing can be improved without restricting the position of the contact terminal of the core structure 102 to a specific position, and it is possible to improve the flexibility of the core structure 102 without changing the structure of the core structure 102, The electrical performance of the antenna 100 can be easily changed.

4 is a plan view showing the upper surface and the lower surface of the substrate, respectively, of the multi-directional antenna according to the first exemplary embodiment.

Referring to FIG. 4A, the first conductive pattern 131 to the sixth conductive pattern 136 may be formed on the upper surface of the substrate 104. The first conductive pattern 131 may be formed along one edge of the upper surface of the substrate 104. The first conductive pattern 131 may be electrically connected to one end of the first antenna coil 113. One end of the first antenna coil 113 may be electrically connected to the first soldering terminal 131a formed at the end of the first conductive pattern 131 by soldering or the like. The second conductive pattern 132 may be formed along the other side of the upper surface of the substrate 104. The first conductive pattern 131 and the second conductive pattern 132 may be formed along the rim of the upper surface of the substrate 104 in directions opposite to each other. The second conductive pattern 132 may be electrically connected to the other end of the first antenna coil 113. And the other end of the first antenna coil 113 may be electrically connected to the second soldering terminal 132a formed at the end of the second conductive pattern 132. [

The third conductive pattern 133 may be formed along the upper edge of the upper surface of the substrate 104. The third conductive pattern 133 may be electrically connected to one end of the second antenna coil 115. One end of the second antenna coil 115 may be electrically connected to the third soldering terminal 133a formed at the end of the third conductive pattern 133. [ The fourth conductive pattern 134 may be formed along the lower edge of the upper surface of the substrate 104. The third conductive pattern 133 and the fourth conductive pattern 134 may be formed along the rim in the direction opposite to each other on the upper surface of the substrate 104. The fourth conductive pattern 134 may be electrically connected to the other end of the second antenna coil 115. And the other end of the second antenna coil 115 may be electrically connected to the fourth soldering terminal 134a formed at the end of the fourth conductive pattern 134. [

The fifth conductive pattern 135 may be spaced apart from the first conductive pattern 131 on the inner side of the first conductive pattern 131. The fifth conductive pattern 135 may be electrically connected to one end of the third antenna coil 117. One end of the third antenna coil 117 may be electrically connected to the fifth soldering terminal 135a formed at the end of the fifth conductive pattern 135. [ The sixth conductive pattern 136 may be spaced apart from the second conductive pattern 131 on the inner side of the second conductive pattern 132. The sixth conductive pattern 136 may be electrically connected to the other end of the third antenna coil 117. And the other end of the third antenna coil 117 may be electrically connected to the sixth soldering terminal 136a formed at the end of the sixth conductive pattern 136. [

Here, the first to sixth soldering terminals 131a to 136a may be formed on the rim of the substrate 104, respectively. In this case, the distance from the core structure 102 is ensured, and the soldering operation can be easily performed. The shape, length, and position of the first conductive pattern 131 and the sixth conductive pattern 136 can be variously changed as needed. As a result, the electrical performance of the multi-directional antenna 100 can be easily changed.

On the other hand, a first dummy conductive pattern 137 and a second dummy conductive pattern 138 may be further formed on the upper surface of the substrate 104. The first dummy conductive pattern 137 may be formed along the upper side of one side of the storage hole 123 on the upper surface of the substrate 104. A part of the first dummy conductive pattern 137 may be formed in parallel to the fifth conductive pattern 135 so as to be spaced apart from the fifth conductive pattern 135.

The second dummy conductive pattern 138 may be formed along the other lower-side corner of the storage hole 123 on the upper surface of the substrate. That is, the second dummy conductive pattern 138 may be formed in the diagonal direction of the first dummy conductive pattern 137. A portion of the second dummy conductive pattern 138 may be spaced apart from the sixth conductive pattern 136 in parallel with the sixth conductive pattern 136. [ Here, the first dummy conductive pattern 137 and the second dummy conductive pattern 138 are formed on the upper surface of the substrate 104, but the present invention is not limited thereto. The dummy conductive pattern may have various numbers and shapes .

Referring to FIG. 4B, a first connection pad 141 to a sixth connection pad 146 may be formed on a lower surface of the substrate 104. The first connection pad 141 may be formed at one side of the lower surface of the substrate 104 and may be electrically connected to the first conductive pattern 131 via the via hole 151. The second connection pad 142 may be formed on the other side of the lower surface of the substrate 104 and may be electrically connected to the second conductive pattern 132 via the via hole 151. The first connection pad 141 and the second connection pad 142 may be ground connection pads. The first connection pad 141 and the second connection pad 142 may be electrically connected to the ground of the main board (not shown).

The third connection pad 143 may be formed on the lower surface of the substrate 104 and electrically connected to the third conductive pattern 133 via the via hole 151. The fourth connection pad 144 may be formed on the lower surface of the substrate 104 and electrically connected to the fourth conductive pattern 134 via the via hole 151. [ The fifth connection pad 145 may be spaced apart from the first connection pad 141 on one side of the lower surface of the substrate 104 and may be electrically connected to the fifth conductive pattern 135 via the via hole 151 . The sixth connection pad 146 may be spaced apart from the second connection pad 142 on the other side of the lower surface of the substrate 104 and may be electrically connected to the sixth conductive pattern 136 via the via hole 151 .

The first dummy connection pad 147 and the second dummy connection pad 148 may be additionally formed on the lower surface of the substrate 104. The first dummy connection pad 147 is formed on the lower surface of the substrate 104 so as to be spaced apart from the third connection pad 143 and electrically connected to the first dummy conductive pattern 137 via the via hole 151 have. The second dummy connection pad 148 is formed to be spaced apart from the fourth connection pad 144 at the lower side of the substrate 104 and electrically connected to the second dummy conductive pattern 138 via the via hole 151 have.

The connection positions of the respective antenna coils can be changed through the first dummy connection pad 147 and the second dummy connection pad 148 and can be used to electrically connect to other electronic elements as required. Mounting holes (not shown) for mounting the substrate 104 on the main board may be additionally formed at each corner of the substrate 104. In this case, it is possible to mount the substrate 104 on the main board using a coupling method other than SMT (Surface Mounting Technology) (for example, coupling using a fused projection), and the like.

Fig. 5 is an exploded perspective view showing a multi-directional antenna according to a second exemplary embodiment, Fig. 6 is a plan view showing a state in which a core structure is placed on a first substrate in a multi-directional antenna according to an exemplary second embodiment And FIG. 7 is a bottom view showing a state in which the core structure is placed on the first substrate in the multi-directional antenna according to the second exemplary embodiment.

5 through 7, the multi-directional antenna 200 may include a core structure 202, a first substrate 204, and a second substrate 206. The core structure 202 may include a magnetic core 211, a first antenna coil 213, a second antenna coil 215, and a third antenna coil 217. The core structure 202 is the same as or similar to the core structure 102 of the first embodiment shown in FIGS. 1 to 3, and thus a detailed description thereof will be omitted.

The first substrate 204 is electrically connected to the core structure 202. That is, the first substrate 204 is electrically connected to the first antenna coil 213, the second antenna coil 215, and the third antenna coil 217. The first substrate 204 may have a size corresponding to the core structure 202. A storage hole 223 may be formed at the center of the first substrate 204. The accommodating hole 223 may be formed to have a size corresponding to that of the magnetic core 211. The seating portions 223a may be formed at the corner portions of the storage holes 223, connecting the adjacent sides. The seating portion 223a may be provided corresponding to the seating groove 221 formed on the lower surface of the magnetic core 211. [

The core structure 202 can be seated on the upper surface of the first substrate 204 while the lower end of the magnetic core 211 is inserted into the storage hole 223. At this time, the third antenna coil 217 is seated on the rim of the first substrate 204. Then, the seating groove 221 of the magnetic core 211 is seated on the seating portion 223a. Here, the lower surface of the core structure 202 and the lower surface of the first substrate 204 may be located on the same plane.

The first soldering terminal 231a to the sixth soldering terminal 236a may be formed on the lower surface of the first substrate 204 so as to be electrically connected to the core structure 202. [ The core structure 202 is electrically connected to the first soldering terminal 231a through the sixth soldering terminal 236a through soldering or the like so that the core structure 202 can be stably fixed to the first substrate 204 do.

Specifically, the first soldering terminal 231a is formed adjacent to the storage hole 223 on one side of the lower surface of the first substrate 204, and one end of the first antenna coil 213 may be electrically connected through soldering or the like have. The second soldering terminal 232a may be formed on the other side of the lower surface of the second substrate 204 adjacent to the receiving hole 223 and the other end of the first antenna coil 213 may be electrically connected. The third soldering terminal 233a is formed adjacent to the storage hole 223 on the upper surface of the lower surface of the first substrate 204 and one end of the second antenna coil 215 can be electrically connected. The fourth soldering terminal 234a may be formed adjacent to the storage hole 223 on the lower side of the lower surface of the second substrate 204 and the other end of the second antenna coil 215 may be electrically connected. The fifth soldering terminal 235a may be formed at the edge of one side edge of the lower surface of the first substrate 204 and one end of the third antenna coil 217 may be electrically connected. The sixth soldering terminal 236a may be formed at the edge of the other side edge of the lower surface of the first substrate 204 and the other end of the third antenna coil 217 may be electrically connected.

On the lower surface of the first substrate 204, first connection pads electrically connected to the first soldering terminals 231a through the sixth soldering terminals 236a may be formed. That is, a first connection pad 250-1 and a second soldering terminal 250-1 which are separated from the first soldering terminal 231a and are electrically connected to the first soldering terminal 231a are formed on the lower surface of the first substrate 204, A second connection pad 250-2 spaced apart from the first soldering terminal 232a and electrically connected to the second soldering terminal 232a and a second soldering terminal 232b spaced apart from the third soldering terminal 233a and electrically connected to the third soldering terminal 233a, A fourth connection pad 250-4 which is spaced apart from the fourth soldering terminal 234a and is electrically connected to the fourth soldering terminal 234a, A fifth connection pad 250-5 spaced apart from the terminal 235a and electrically connected to the fifth soldering terminal 235a and a sixth soldering terminal 236a spaced apart from the sixth soldering terminal 236a, The first to sixth connection pads 250-6 electrically connected to each other may be formed. The 1-1 connection pad 250-1 to the 1-6 connection pad 250-6 are for electrically connecting the first substrate 204 to the second substrate 206. [ A detailed description thereof will be described later.

The second substrate 206 may be formed under the first substrate 204. And a second substrate 206 may be stacked on the lower surface of the first substrate 204. The second substrate 206 may serve to electrically connect the first substrate 204 to a main board (not shown). Here, the main board may be a main board of a mobile device (e.g., a wearable device such as a smart watch, a smart phone, a tablet PC, a smart key, etc.) to which the multi-directional antenna 200 is mounted. The second substrate 206 may have a size corresponding to that of the first substrate 204.

FIG. 8 is a top view of a second substrate 206 in a multi-directional antenna according to a second exemplary embodiment, and FIG. 9 is a cross-sectional view of a second substrate 206 in a multi- 10 is a bottom perspective view of a multi-directional antenna according to a second exemplary embodiment. 8 to 10, the first to sixth window holes 251 to 256 may be formed on the second substrate 206. In addition,

Specifically, the first window hole 251 may be formed through the second substrate 206 at a position corresponding to the first soldering terminal 231a. The first window hole 251 may be formed inwardly from one side edge of the second substrate 206. The second window hole 252 may be formed through the second substrate 206 at a position corresponding to the second soldering terminal 232a. The second window hole 252 may be formed inward from the other edge of the second substrate 206. The third window hole 253 may be formed through the second substrate 206 at a position corresponding to the third soldering terminal 233a. The third window hole 253 may be formed inwardly from the upper edge of the second substrate 206. The fourth window hole 254 may be formed through the second substrate 206 at a position corresponding to the fourth soldering terminal 234a. The fourth window hole 254 may be formed inward from the lower edge of the second substrate 206. The fifth window hole 255 may be formed through the second substrate 206 at a position corresponding to the fifth soldering terminal 235a. The fifth window hole 255 may be formed inwardly at one side edge of the second substrate 206. The sixth window hole 256 may be formed through the second substrate 206 at a position corresponding to the sixth soldering terminal 236a. The sixth window hole 256 may be formed inward from the other edge of the second substrate 206. The first to sixth soldering terminals 231a to 236a are exposed to the outside through the first to sixth window holes 251 to 256.

That is, if soldering is performed on the first soldering terminal 231a to the sixth soldering terminal 236a, a corresponding portion may not be flat due to soldering characteristics, and a protruded portion may be formed. The first to sixth soldering terminals 231a to 236a are exposed to the outside through the first to sixth window holes 251 to 256, The first substrate 204 and the second substrate 206 are electrically connected to the protruding portion by soldering so that the first substrate 204 and the second substrate 206 are electrically connected to each other So that the thickness of the multi-directional antenna 200 can be minimized.

Second connection pads electrically connected to the first connection pads 250-1 to 250-6 formed on the lower surface of the first substrate 204 may be formed on the upper surface of the second substrate 206. [ Specifically, on the upper surface of the second substrate 206, a second-first connecting pad 250-1, which is formed at a position corresponding to the first connecting pad 250-1 and is electrically connected to the first connecting pad 250-1, A connection pad 260-1, a second-second connection pad 260 (not shown) formed at a position corresponding to the first-second connection pad 250-2 and electrically connected to the first-second connection pad 250-2 -2), a second to third connection pad 260-3 formed at a position corresponding to the first to third connection pads 250-3 and electrically connected to the first to third connection pads 250-3, A second 2-4 connecting pad 260-4 formed at a position corresponding to the 1-4th connecting pad 250-4 and electrically connected to the 1-4th connecting pad 250-4, A second 2-5 connection pad 260-5 formed at a position corresponding to the connection pad 250-5 and electrically connected to the first 1-5 connection pad 250-5, 6 connecting pad 260-6 formed at a position corresponding to the first through sixth connection pads 250-6 and electrically connected to the first 1-6 connection pads 250-6 Can. A via hole 261 may be formed through the second substrate 206 in the second to first connection pads 260-1 to 260-2.

Third connection pads electrically connected to the second connection pads 260-1 to 260-6 formed on the upper surface of the second substrate 206 may be formed on the lower surface of the second substrate 206. [ In detail, the lower surface of the second substrate 206 is electrically connected to the second-1 connection pad 260-1 through a via hole 261 formed in the second-1 connection pad 260-1. 2 connecting pad 260-2 electrically connected to the second-second connecting pad 260-2 through the via hole 261 formed in the first-second connecting pad 270-1 and the second-second connecting pad 260-2, A third 3-3 connection pad 270-2 electrically connected to the second 2-3 connection pad 260-3 through a via hole 261 formed in the second 3-4 connection pad 260-3, A third 3-4 connection pad 270-4 electrically connected to the 2-4 connection pad 260-4 via a via hole 261 formed in the 2-4 connection pad 260-4, A third 3-5 connection pad 270-5 electrically connected to the 2-5 connection pad 260-5 through a via hole 261 formed in the 2-5 connection pad 260-5, 6 connection pad 270-6 electrically connected to the 2-6 connection pad 260-6 may be formed through the via hole 261 formed in the connection pad 260-6 have. The 3-1 connection pad 270-1 to the 3-6 connection pad 270-6 may be electrically connected to a main board (not shown). At least one dummy connection pad 280 may be formed on the lower surface of the second substrate 206. The dummy connection pad 280 may be electrically connected to any one of the 3-1 connection pad 270-1 to the 3-6 connection pad 270-6.

According to the embodiment of the present invention, the second substrate 206 is laminated on the lower part of the first substrate 204 and the first connection pads 250-1 to 250-6 and the second connection pads 260-1 to 260-6 The first substrate 204, the second substrate 206, and the main board (not shown) are electrically connected to each other through the third connection pads 270-1 to 270-6, The first substrate 204 and the second substrate 206 may be formed to have a size corresponding to that of the core structure 202, thereby miniaturizing the size of the multi-directional antenna 200.

The thickness of the multi-directional antenna 200 can be reduced by inserting the lower end of the magnetic core 211 inside the accommodation hole 223 formed in the first substrate 204. That is, although the multi-directional antenna 200 includes two stacked substrates, the bottom height of the magnetic core 211 is made to correspond to the bottom height of the first substrate 204 through the accommodation holes 223, It is possible to reduce only the thickness of the two pieces.

FIG. 11 is an exploded perspective view showing a multi-directional antenna according to a third exemplary embodiment, and FIG. 12 is a bottom perspective view of a multi-directional antenna according to an exemplary third embodiment.

Referring to Figs. 11 and 12, the multi-directional antenna 300 may include a core structure 302 and a connecting member 308. Fig. The core structure 302 may include a magnetic core 311, a first antenna coil 313, a second antenna coil 315, and a third antenna coil 317. The core structure 302 is the same as or similar to the core structure 102 of the first embodiment shown in FIGS. 1 to 3, and thus a detailed description thereof will be omitted. However, the coupling protrusions 325 may protrude from the bottom corners of the magnetic core 311.

The connection member 308 may serve to electrically connect the core structure 302 and a main board (not shown). The connecting member 308 may include first to fourth connecting members 308-1 to 308-4. The body of the first connecting member 308-1 to the fourth connecting member 308-4 may have a coupling groove 327 having a shape corresponding to the coupling projection 325, respectively. The first connecting member 308-1 to the fourth connecting member 308-4 are formed so that the engaging protrusions 325 of the lower corners of the magnetic core 311 are inserted into the engaging grooves 327 of the connecting member, .

Soldering terminals 329 for electrically connecting the first antenna coil 313 to the third antenna coil 317 are formed on the bodies of the first connecting member 308-1 to the fourth connecting member 308-4 As shown in Fig. A connection pad 381 electrically connected to the soldering terminal 329 may be formed on the bodies of the first to fourth connection members 308-1 to 308-4. The connection pad 381 may be electrically connected to a main board (not shown).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, . Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100, 200, 300: Multipurpose antenna
102, 202, 302: core structure
104: substrate
111, 211, 311: magnetic core
113, 213, and 313: a first antenna coil
115, 215, and 315: a second antenna coil
117, 217, 317: a third antenna coil
121, 221: seat groove
123, 223: storage hole
123a and 223a:
131: first conductive pattern
131a and 231a: a first soldering terminal
132: second conductive pattern
132a, 232a: second soldering terminal
133: Third conductive pattern
133a, 233a: third soldering terminal
134: fourth conductive pattern
134a, 234a: Fourth soldering terminal
135: fifth conductive pattern
135a and 235a: fifth soldering terminal
136: Sixth conductive pattern
136a, 236a: sixth soldering terminal
137: first dummy conductive pattern
138: Second dummy conductive pattern
141: first connection pad
142: second connection pad
143: Third connection pad
144: fourth connection pad
145: fifth connection pad
146: sixth connection pad
147: first dummy connection pad
148: second dummy connection pad
204: first substrate
206: second substrate
250-1: 1-1 connection pad
250-2: 1-2 connection pad
250-3: the 1-3 connecting pad
250-4: 1-4th connection pad
250-5: No. 1-5 connection pad
250-6: 1-6 connection pad
251: first window hole
252: second window hole
253: third window hole
254: fourth window hole
255: fifth window hole
256: sixth window hole
260-1: 2-1 connection pad
260-2: No. 2-2 connection pad
260-3: second to third connection pads
260-4: second to fourth connection pads
260-5: No. 2-5 connection pad
260-6: 2-6 connection pads
261: Via hole
270-1: 3-1 connection pad
270-2: No. 3-2 connection pad
270-3: third 3-3 connection pad
270-4: third 3-4 connection pad
270-5: third 3-5 connection pad
270-6: 3-6 connecting pads
280: dummy connection pad
308:
308-1: first connection member
308-2: second connecting member
308-3: third connecting member
308-4: fourth connecting member
325: engaging projection
327: Coupling groove
329: Soldering terminal
381: Connection pad

Claims (21)

A second antenna coil wound around a second axial direction perpendicular to the first axial direction of the magnetic core, and a second antenna coil wound around the first axial direction of the magnetic core, And a third antenna coil formed on the core and wound around a third axial direction perpendicular to the first axial direction and the second axial direction;
A substrate having a center hole formed with a receiving hole into which a lower end of the core structure is inserted, the core structure being seated and electrically connected to the core structure;
A conductive pattern formed on an upper surface of the substrate and electrically connected to the core structure;
A connection pad formed on a lower surface of the substrate and electrically connected to the main board and electrically connected to the conductive pattern through a via hole passing through the substrate;
At least one dummy conductive pattern formed on an upper surface of the substrate so as to be spaced apart from the conductive pattern; And
And at least one dummy connection pad formed at a lower surface of the substrate and spaced apart from the connection pad and electrically connected to the dummy conductive pattern through a via hole penetrating the substrate.
The method according to claim 1,
Wherein the magnetic core includes a seating groove formed so that a bottom edge of the magnetic core is removed by a predetermined thickness and has a stepped portion with respect to a bottom surface of the magnetic core,
Wherein the substrate includes a seating portion in which each corner portion of the accommodation hole extends inward so that the seating groove is seated on an upper surface of the substrate.
The method of claim 2,
Wherein the bottom surface of the core structure and the bottom surface of the substrate have the same height.
delete delete The method according to claim 1,
In the conductive pattern,
A first conductive pattern formed along an edge of the upper surface of the substrate and electrically connected to one end of the first antenna coil;
A second conductive pattern formed along the other edge of the upper surface of the substrate and electrically connected to the other end of the first antenna coil;
A third conductive pattern formed along the upper edge of the upper surface of the substrate and electrically connected to one end of the second antenna coil;
A fourth conductive pattern formed along the lower edge of the upper surface of the substrate and electrically connected to the other end of the second antenna coil;
A fifth conductive pattern formed inside the first conductive pattern and spaced apart from the first conductive pattern and electrically connected to one end of the third antenna coil; And
And a sixth conductive pattern formed inside the second conductive pattern and spaced apart from the second conductive pattern and electrically connected to the other end of the third antenna coil.
The method of claim 6,
The connection pad includes:
A first connection pad formed on one side of a lower surface of the substrate and electrically connected to the first conductive pattern through a via hole;
A second connection pad formed on the other side of the lower surface of the substrate and electrically connected to the second conductive pattern through a via hole;
A third connection pad formed on the lower surface of the substrate and electrically connected to the third conductive pattern through a via hole;
A fourth connection pad formed below the lower surface of the substrate and electrically connected to the fourth conductive pattern through a via hole;
A fifth connection pad formed on one side of the bottom surface of the substrate and spaced apart from the first connection pad and electrically connected to the fifth conductive pattern through a via hole; And
And a sixth connection pad formed on the other surface of the substrate and spaced apart from the second connection pad and electrically connected to the sixth conductive pattern via a via hole.
The method of claim 6,
The multi-
A first soldering terminal formed at an end of the first conductive pattern and provided at one side edge of the substrate;
A second soldering terminal formed at an end of the second conductive pattern and provided at the other edge of the substrate;
A third soldering terminal formed at an end of the third conductive pattern and provided at an upper edge of the substrate;
A fourth soldering terminal formed at an end of the fourth conductive pattern and provided at a lower edge of the substrate;
A fifth soldering terminal formed at an end of the fifth conductive pattern and spaced apart from the first soldering terminal at one side edge of the substrate; And
And a sixth soldering terminal formed at an end of the sixth conductive pattern and spaced apart from the second soldering terminal on the other edge of the substrate.
The method according to claim 1,
The multi-
Further comprising a mounting hole formed in at least one of the corners of the board for mounting the board on a main board of a mobile device on which the multi-directional antenna is mounted.
A second antenna coil wound around a second axial direction perpendicular to the first axial direction of the magnetic core, and a second antenna coil wound around the first axial direction of the magnetic core, And a third antenna coil formed on the core and wound around a third axial direction perpendicular to the first axial direction and the second axial direction;
A first substrate provided below the core structure, the first substrate on which the core structure is mounted and electrically connected to the core structure;
A second substrate provided below the first substrate and electrically connected to the first substrate and electrically connected to the main board;
A plurality of soldering terminals provided on a lower surface of the first substrate and electrically connected to the core structure and spaced apart from each other; And
And a plurality of window holes formed through the second substrate and formed at positions corresponding to the plurality of soldering terminals.
The method of claim 10,
Wherein the first substrate and the second substrate each have a light-
And a size corresponding to the core structure.
The method of claim 10,
The multi-
Further comprising: a receiving hole formed in a central portion of the first substrate and into which a lower end of the core structure is inserted.
The method of claim 12,
Wherein the magnetic core includes a seating groove formed so that a bottom edge of the magnetic core is removed by a predetermined thickness and has a stepped portion with respect to a bottom surface of the magnetic core,
Wherein the first substrate includes a seating portion in which each corner portion of the accommodation hole extends inward so that the seating groove is seated on the upper surface of the first substrate.
14. The method of claim 13,
Wherein the bottom surface of the core structure and the bottom surface of the first substrate have the same height.
delete The method of claim 10,
The multi-
And a plurality of first connection pads formed on a lower surface of the first substrate and spaced apart from the plurality of soldering terminals and electrically connected to the plurality of soldering terminals and electrically connected to the second substrate, , A multi-directional antenna.
18. The method of claim 16,
The multi-
A plurality of second connection pads formed on an upper surface of the second substrate and electrically connected to the plurality of first connection pads, respectively; And
Further comprising a plurality of third connection pads formed on a lower surface of the second substrate and electrically connected to the plurality of second connection pads via via holes formed in the second substrate.
A second antenna coil wound around a second axial direction perpendicular to the first axial direction of the magnetic core, and a second antenna coil wound around the first axial direction of the magnetic core, And a third antenna coil formed on the core and wound around a third axial direction perpendicular to the first axial direction and the second axial direction;
A plurality of connection members coupled to the lower corners of the magnetic core at a lower portion of the core structure, electrically connected to the core structure, and electrically connected to the main board; And
Further comprising an engaging protrusion protruding from each corner of the lower surface of the magnetic core,
Wherein the connecting member is engaged with the magnetic core by the engaging projection.
delete 19. The method of claim 18,
The connecting member
Body;
A coupling groove formed on one surface of the body and having a shape corresponding to the coupling projection and into which the coupling projection is inserted;
At least one soldering terminal protruding from the body and electrically connected to the core structure; And
And at least one connection pad formed on the other surface of the body and electrically connected to the soldering terminal and electrically connected to the main board.
A mobile device comprising the multi-directional antenna according to any one of claims 1 to 3, claims 6 to 14, claims 16 to 18, and claim 20.

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